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1 /* crypto/des/rpc_enc.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3  * All rights reserved.
4  *
5  * This package is an SSL implementation written
6  * by Eric Young (eay@cryptsoft.com).
7  * The implementation was written so as to conform with Netscapes SSL.
8  *
9  * This library is free for commercial and non-commercial use as long as
10  * the following conditions are aheared to.  The following conditions
11  * apply to all code found in this distribution, be it the RC4, RSA,
12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
13  * included with this distribution is covered by the same copyright terms
14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15  *
16  * Copyright remains Eric Young's, and as such any Copyright notices in
17  * the code are not to be removed.
18  * If this package is used in a product, Eric Young should be given attribution
19  * as the author of the parts of the library used.
20  * This can be in the form of a textual message at program startup or
21  * in documentation (online or textual) provided with the package.
22  *
23  * Redistribution and use in source and binary forms, with or without
24  * modification, are permitted provided that the following conditions
25  * are met:
26  * 1. Redistributions of source code must retain the copyright
27  *    notice, this list of conditions and the following disclaimer.
28  * 2. Redistributions in binary form must reproduce the above copyright
29  *    notice, this list of conditions and the following disclaimer in the
30  *    documentation and/or other materials provided with the distribution.
31  * 3. All advertising materials mentioning features or use of this software
32  *    must display the following acknowledgement:
33  *    "This product includes cryptographic software written by
34  *     Eric Young (eay@cryptsoft.com)"
35  *    The word 'cryptographic' can be left out if the rouines from the library
36  *    being used are not cryptographic related :-).
37  * 4. If you include any Windows specific code (or a derivative thereof) from
38  *    the apps directory (application code) you must include an acknowledgement:
39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40  *
41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51  * SUCH DAMAGE.
52  *
53  * The licence and distribution terms for any publically available version or
54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
55  * copied and put under another distribution licence
56  * [including the GNU Public Licence.]
57  */
58 
59 #include "rpc_des.h"
60 #include "des_locl.h"
61 #include "des_ver.h"
62 
63 int _des_crypt(char *buf,int len,struct desparams *desp);
_des_crypt(char * buf,int len,struct desparams * desp)64 int _des_crypt(char *buf, int len, struct desparams *desp)
65 	{
66 	DES_key_schedule ks;
67 	int enc;
68 
69 	DES_set_key_unchecked(&desp->des_key,&ks);
70 	enc=(desp->des_dir == ENCRYPT)?DES_ENCRYPT:DES_DECRYPT;
71 
72 	if (desp->des_mode == CBC)
73 		DES_ecb_encrypt((const_DES_cblock *)desp->UDES.UDES_buf,
74 				(DES_cblock *)desp->UDES.UDES_buf,&ks,
75 				enc);
76 	else
77 		{
78 		DES_ncbc_encrypt(desp->UDES.UDES_buf,desp->UDES.UDES_buf,
79 				len,&ks,&desp->des_ivec,enc);
80 #ifdef undef
81 		/* len will always be %8 if called from common_crypt
82 		 * in secure_rpc.
83 		 * Libdes's cbc encrypt does not copy back the iv,
84 		 * so we have to do it here. */
85 		/* It does now :-) eay 20/09/95 */
86 
87 		a=(char *)&(desp->UDES.UDES_buf[len-8]);
88 		b=(char *)&(desp->des_ivec[0]);
89 
90 		*(a++)= *(b++); *(a++)= *(b++);
91 		*(a++)= *(b++); *(a++)= *(b++);
92 		*(a++)= *(b++); *(a++)= *(b++);
93 		*(a++)= *(b++); *(a++)= *(b++);
94 #endif
95 		}
96 	return(1);
97 	}
98 
99